Sun and Wind-powered ferry coming to San Fran

Hornblower Yachts plans to purchase two 600-passenger trimarans from Solar Sailor of Australia, these hybridized ferries will cost between $6 and $8 million, and will cut emissions in half compared to similar sized conventional ferries.

Power will be supplied in the form of wind, solar and diesel fuel, with a retractable 45-foot high wing covered in solar panels. The wing can generate 170hp on its own sail, when pushing heavy the sail goes down and starts to collect sunlight.